HP ProBook 6440b HP ProBook 6545b, 6540b, 6445b and 6440b Notebook PC - Mainte - Page 17
Top components, Display components - wireless switch
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External component identification Top components Display components ✎ Your computer may look slightly different from the illustration in this section. Item Component Description (1) WWAN antennas (2)* Send and receive wireless signals to communicate with wireless wide-area networks (WWAN). (2) Internal microphones (1 or 2, varying Record sound. by computer model)† ✎ If there is a microphone icon next to each microphone opening, your computer has internal microphones. (3) WLAN antennas (2)* Send and receive wireless signals to communicate with wireless local area networks (WLAN). (4) Webcam light (select models only) On: The webcam is in use. (5) Webcam (select models only) Records audio and video and captures still photographs. (6) Internal display switch Turns off the display or initiates the Sleep state (Windows 7 and Windows Vista) or Standby (Windows XP) if the display is closed while the power is on. *The antennas are not visible from the outside of the computer. For optimal transmission, keep the areas immediately around the antennas free from obstructions. †Only computers equipped with a webcam are equipped with 2 microphones. Computers not equipped with a webcam are equipped with only one microphone. 2-2 Maintenance and Service Guide